The Practical Role of Induced Resistance for Crop Protection

Tony Reglinski*, Neil Havis, Helen Rees, Huub de Jong

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

6 Citations (Scopus)
28 Downloads (Pure)


Plants have evolved a highly sophisticated immune system to resist pathogen attack comprising both preformed and inducible mechanisms. Over the last 50 years, various biological and chemical inducers have been used to artificially trigger the defense response in plants, thereby promoting an ‘induced resistance’ (IR) to subsequent pathogen attack. IR has proven effective for disease control in laboratory and glasshouse conditions but has seldom equalled the level of protection offered by synthetic pesticides in the field. However, renewed interest in IR for crop protection is being driven by legislation to reduce the use of synthetic chemicals in agriculture. Inducers can contribute to integrated crop management strategies when used in combination with fungicides, bactericides, and with other biological control options. Integrating inducers in this way can reduce chemical inputs without loss of efficacy. Moreover, advances in our understanding of plant defense are informing the development of new inducers and guiding new strategies for their implementation in sustainable crop protection. This review will discuss the use of IR in selected cropping systems and describe opportunities for optimizing its potential, including the development of more effective inducers and their integration with conventional and cultural control options.
Original languageEnglish
Pages (from-to)719-731
Number of pages13
Issue number4
Early online date4 May 2023
Publication statusPrint publication - 11 May 2023


  • Plant Science
  • Agronomy and Crop Science
  • disease resistance
  • plant immune responses


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